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Marcus, U., Gassowski, M., & Drewes, J. (2016). HIV risk perception and testing behaviours among men having sex with men (MSM) reporting potential transmission risks in the previous 12 months from a large online sample of MSM living in Germany. BMC Public Health, 16(1), 1111.

Marcus, U., Gassowski, M., Kruspe, M., & Drewes, J. (2015). Recency and frequency of HIV testing among men who have sex with men in Germany and socio-demographic factors associated with testing behaviour. BMC Public Health, 15(1), 727.

Kramer, S. C., Drewes, J., Kruspe, M., & Marcus, U. (2015). Factors associated with sexual risk behaviors with non-steady partners and lack of recent HIV testing among German men who have sex with men in steady relationships: results from a cross-sectional internet survey. BMC Public Health, 15(1), 702.

Marcus, U., an der Heiden, M., Gassowski, M., Kruspe, M., & Drewes, J. (2015). The impact of meeting locations for men having sex with men on the risk for bacterial sexually transmitted infections: analyses from a cross-sectional online survey. BMJ Open, 5(11), e009107.

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